Sustanon 250 is the most commonly used Sustanon product in bodybuilding, manufactured by Organon. Sustanon is a mix of 4 testosterone esters: testosterone propionate 30 mg/ml, testosterone phenylpropionate 60 mg/ml, testosterone isocaproate 60 mg/ml and testosterone decanoate 100 mg/ml. Total 250 mg/ml. All 4 components work in a synergic time-released effect for up to 2 weeks. It leads to substantial growth in strength and body mass without the need of frequent injecting. It causes less water retention and estrogenic side effects than other individual Testosterone depos. That's why it's very popular and highly appreciated by bodybuilders.